Resolve scalar and aggregate UDF overloads by arity - #91
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Summary
TypeSignatureThis enables Snowflake-compatible functions such as
ST_COLLECT, which has both a two-argument scalar form and a one-argument aggregate form. Resolution happens once during SQL planning and adds no per-row execution overhead.Validation
cargo +1.95.0 test -p datafusion-expr-common(165 unit tests and 11 doc tests)cargo +1.95.0 test -p datafusion-sql --test sql_integration(609 tests)cargo +1.95.0 clippy -p datafusion-sql -p datafusion-expr-common --all-targets -- -D warnings